[SOLVED] CL19 / CL17?

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Nov 28, 2021
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Hey i have a question. I was thinking about buying some ram. But i ran into a problem that i need answered.

It's simple i found a 4000Mhz ( Patriot Viper Steel 2x8 ) one, and a 3600Mhz ( Kingston Fury Beast 2x8 ). But here comes the problems. I dont want to make a mistake because the 4000Mhz one is CL19, but the 3600Mhz one is CL17.

Is it gonna make much difference, and which one's should i buy if it doesn't make much fps differnce.
 

Eximo

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Hey, i still wouldn't decline myself from Samsung B-Die kit)
And i sent him a name for 3600 CL16 kit he probably can buy

Yeah, not all of these posts exactly landed in order. Samsung B-die is good stuff, but only if you plan on overclocking or tightening timings.

I'm lazy, I just buy the speed I want and set it. I can't recall how many hours I spent messing with my old i7-950 to get it stable at various memory multipliers.
 

DimkaTsv

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or tightening timings.
More of that, i guess... because most available kits having not equal timings for read a write except B-die.
Like my kit can run even 3333 CL 14 (even if not very stable, but just for example), but i cannot lower my tRCD and tRP from 18 even down for 1 basically
And i cannot even increase them without losing stability...
But yeah this is long work and pain in ass
 

DimkaTsv

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Nov 7, 2021
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I think these are perfect? But im still confused am i able to run the 3600Mhz at full speed?
Yeah this is one of cheapest kits with low tCL and 3200+
And about processor limits, lemme check...
Not to say it actually can vary from CPU to CPU sample and even between different motherboards of same type
 

DimkaTsv

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Nov 7, 2021
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Aight imma wait for you to check ty for checking the cpu rq
Well it seems memory controller on 2600x is able to run guaranteed only up to 2933 by AMD spec
3200 is doable as some people said, but already as dice roll basically
3600 is 95% no-no, sadly for you, it will require hard work with tweaking stuff...
So you probably better to look on lower frequency stuff. But starting from 3200 CL14 prices rises up pretty darn hard

PS from people talk 3200 CL 14 also iskinda dice roll on 2600x, even if not that hard roll. Yeah Ryzen 1XXX and 2XXX memory controller was quite bad
 

DimkaTsv

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Nov 7, 2021
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So i should look for 3200Mhz CL14 ram, and then down. Also only CL14?
Nah, i would've not looked specifically for CL 14 with 2600x, just because of it's memory controller...
And 3200 CL14 prices are like 50-60% more than these Patriot Viper 4000 sticks...
So, i am not sure if that's even worth.
Just buy whatever 3200 CL16 sticks you find with tighter tRCD and tRP timings (16-18-18)
 
Hey i have a question. I was thinking about buying some ram. But i ran into a problem that i need answered.

It's simple i found a 4000Mhz ( Patriot Viper Steel 2x8 ) one, and a 3600Mhz ( Kingston Fury Beast 2x8 ). But here comes the problems. I dont want to make a mistake because the 4000Mhz one is CL19, but the 3600Mhz one is CL17.

Is it gonna make much difference, and which one's should i buy if it doesn't make much fps differnce.
https://notkyon.moe/ram-latency.htm
see here, lower latency number = better
values around 8-8.5ns are best in class

some apps reacts more to bandwith
some reacts more to latency
eitherway ~9.5ns are on both so no real diff between them when comparing ram latencies

as far as frequency goes, rams are mostly overclockable, so you can run 3600MHz sticks at higher frequencies, you will just need to correct ram timings to match your desired frequency
 
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Nov 28, 2021
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Which one?:
 
Well it seems memory controller on 2600x is able to run guaranteed only up to 2933 by AMD spec
3200 is doable as some people said, but already as dice roll basically
3600 is 95% no-no, sadly for you, it will require hard work with tweaking stuff...
So you probably better to look on lower frequency stuff. But starting from 3200 CL14 prices rises up pretty darn hard

PS from people talk 3200 CL 14 also iskinda dice roll on 2600x, even if not that hard roll. Yeah Ryzen 1XXX and 2XXX memory controller was quite bad
i agree, i used to have ryzen 5 1600x, samsung b die 3200CL14, with XMP on only 3066MHz was stable, with manual tunning 3400MHz was max, mainboard x370
switched to zen 2 3800x and its running 3733 CL16 1.35v :) even tho asrock was back then saying that x370 boards had issues with 3200Mhz...wasnt mainboard fault at all ;)

for OP, it shouldnt matter which ram you will buy, you can future proof it with higher clock as long its not overprized
so if you get cheap 4000MHz sticks, they wont run at that rated speed with your current CPU at all..2933MHz is rated for your CPU, but it usualy runs slightly above that without tweaking anything (3066-3200), it depends on memory controller...kinda lottery there
but once you swap CPU to zen2 or zen3, then they will run at higher clock
zen 2/zen3 can run 3600Mhz on every CPU from this serie, then once again lotery with infinity fabric/memory controller to run it above that speed stable in 1:1 mode
 
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DimkaTsv

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Nov 7, 2021
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2x8 is better than 1x16, always (unless you are going for single stick OC or 4x8 vs 2x16)
RGB is just more expenses if you don't need it
Fury Beast is 16-18-18 and cheapest
Fury Renegade is 16-18-18 too, and bit more expensive
Both have 2 XMP profiles - 3000-15-17-17 and 3200-16-18-18, so they are more safe for you
But Fury Beast can work at less frequency steps overall...

Besides that both are workable with
So on your choise from these 2
 
Remember that you can always buy the faster clocking RAM and run it at lower clocks at tighter timings. There might not be a profile on it, but a bit of math can do the trick (1000/MHz× CL (or DDR/2/MHz× CL) gives you the latency in ms. Pretty simple to compare that way)
So that 3600 CL17 might be able to do 3200 CL15 or 2933 CL14
Same for any of the 3200 CL16 kits, 3000 CL15 is pretty much the same absolute latency.
Obviously that also goes the other direction, more clock with looser timings.
Nothing of that is guaranteed, obviously.
 

DimkaTsv

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Nov 7, 2021
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So what ur saying if i buy Fury Beast at it can't run at 3200Mhz i can lower the frequency? Or?
They do have second XMP with lower frequency from specs i read, so yes, it should be able to do it on few clicks
3600 Renegade also have 3000 15-17-17 XMP, so you may look towards it too, but i fear 3600 is for sure too high for your system
 
Nov 28, 2021
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They do have second XMP with lower frequency from specs i read, so yes, it should be able to do it on few clicks
3600 Renegade also have 3000 15-17-17 XMP, so you may look towards it too, but i fear 3600 is for sure too high for your system
Okay so the Fury Beast it is. Also when i buy it i might make another thread or just message you if that is possible on this site.
Thank you all so much if u have any more suggestions i will see them tomorrow i gotta go to sleep. Again thank's yall a lot.